My opinion is that talking about statistical significance in a context where you have only one sample — again, we don't know how many times they lapped the circuit — is a silly discussion to even have. Should I post a histogram of the lap time distribution?

Let me put this another way. Take this histogram to whatever professor taught you statistics and ask them how you should assess the statistical significance of this data. Be sure to record their reaction, because I love watching people laugh.

Ok fine i'll bite - I could show them your graph, but they would be laughing at you for assuming that's what the sampling distribution of the data looks like.